Bison_FPGA  is multi inteface for zx spectrum and compatible computers, connected to edge connector.  Device includes:

• DivTIESUS by  Miguel Angel Rodríguez Jódar (open source version withs some changes )  
  • DivMMC compatible interface with 8 KiB of EEPROM and 128 KiB of RAM. Standard utils for EEPROM flashing, as provided by the ESXDOS team, are compatible with DivTIESUS.
  • Model autodetection. This means you don't need to put a jumper, or flip a switch to change from using it with a Spectrum 48K and a +3.
  • It uses its own fast clock (28 MHz), so Bison does not need the CPU clock at all 
  • microSD card slot 
  • SLIDE switch is used to indicate BISON that the EEPROM can be flashed (JP2 equivalent) and the automapping feature is disabled.
  • ESXDOS shadowing does not collide with all-RAM feature in +2A/B/3 machines. If the system is in all-RAM mode, ESXDOS ROM mapping is disabled.
  • Soft +3E feature: BISON is able to load +3E ROM images from the SD card, install them as the system ROM (using its own RAM), and make them available to the computer, while disabling the automapping feature (needed for ESXDOS but not for +3eDOS). This, effectively, allows the user to operate his/her +2A/B/3 machine as a +2e/3e one, all without having to open the case and exchange ROMs. A new dot command, ".go3e" makes this possible. Such command only works with DivTIESUS and BISON
  • Soft ROM feature: the soft +3E feature can also be used to load any 16K, 32K or 64K ROM and make the computer to boot with that ROM (the dot command currently supports only 16K ROMs). This means that ROM images for some util/games available for the Spectrum can be run in their original form. No need to have a +2A/B/3 machine to use them.
• Beeper / ULA  sound mixed at audio output 
• Soundrive / covox x 4
• Joystick port working in 8 modes , also in KEMPSTON MOUSE mode- Amiga/ATARI ST mice can be used 
• Reset/ joyport mode controlled by small avr
• Turbo sound - 2 x AY 3-8910 chips ( fpga implementation) based on MIST ZX spectrum core  implementation. 

https://lotharek.DSCloud.biz:5001/sharing/qMMBCEU40 

download and watch :-)

Short manual / usage:

• Model autodetection
  • after power on, device will show You what model is connected to, by blinking with 3 red leds in left top corner (4 times) 
    • all the leds the same time  - AMSTRAD model
    • interchangeable blinks -  Sinclair model 
  • After system is detected, AVR releases reset and device starts upon first z80 request

• SD CARD activity 
  • indicated by green led, located over red ones in left top corner

• FLASHING MODE
  • move FLASH_EN slide switch to right position when requested (default LEFT)
  • Leds will flash accordingly to 80`s disco style ;) 

• Reset
  • press and hold user  button for a least 2 seconds

• Joystick port mode
  • press user button at device  to change mode
  • setting is stored in AVR eeprom
  • mode status is indicated red leds:
    • • 000 Kempston
      • 001 Sinclair 1
      • 010 Sinclair 2
      • 011 Fuller
      • 100 Protek
      • 101 QAOP / SPACEBAR
      • 110 Amiga Mouse
      • 111 ST Mouse

• SD CARD reader 
  • follow divmmc instructions
  • shall work with clones :-)

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